1. 3w - 10w
A: 13w
B: -7w
C: -7
D: 7w
2. y + 1.2y + 1.2z
A: 2.4yz
B: 1.3y + 1.2z
C: 1.2y2 + 1.2z
D: 2.2y + 1.2z
3. 6r + r - 5r
A: 2r
B: 1r + r
C: 0r
D: 7r - 5r
4. 5x + 2(x+6)
A: 7x + 6
B: 7x2 + 12
C: 7x + 12
D: 7x (x + 6)
5. -3m + 3(m + 6)
A: 6
B: -6m + 6
C: 6m + 18
D: 18
Heres my answers I got a 100%
1: B (-7w)
2: D (2.2y + 1.2z)
3: A (2r)
4: C (7x + 12)
5: D (18)
im not sure, what math is this called i may have notes on it
1. To simplify 3w - 10w, we can combine the like terms by subtracting the coefficients. So, 3w - 10w = -7w. Therefore, the correct answer is B: -7w.
2. To simplify y + 1.2y + 1.2z, we can combine the like terms by adding their coefficients. So, y + 1.2y = 2.2y. Therefore, the expression becomes 2.2y + 1.2z. Therefore, the correct answer is D: 2.2y + 1.2z.
3. To simplify 6r + r - 5r, we can combine the like terms by adding or subtracting their coefficients. So, 6r + r - 5r = 7r - 5r = 2r. Therefore, the correct answer is A: 2r.
4. To simplify 5x + 2(x+6), we need to apply the distributive property. Multiplying 2 by every term inside the parentheses gives us 2x + 12. Now we can combine the like terms by adding their coefficients. So, 5x + 2x + 12 = 7x + 12. Therefore, the correct answer is C: 7x + 12.
5. To simplify -3m + 3(m + 6), we need to apply the distributive property. Multiplying 3 by every term inside the parentheses gives us 3m + 18. Now we can combine the like terms by adding or subtracting their coefficients. So, -3m + 3m + 18 = 18. Therefore, the correct answer is D: 18.
1. To simplify the expression 3w - 10w, you need to combine like terms. Like terms are terms that have the same variable(s) raised to the same powers. In this case, both terms have the variable w raised to the power 1.
To combine the two terms, you subtract the coefficients (the numbers in front of the variable w).
So, 3w - 10w can be simplified as -7w.
Therefore, the correct answer is B: -7w.
2. To simplify the expression y + 1.2y + 1.2z, you again need to combine like terms. In this case, the two terms involving y are like terms because they have the same variable y raised to the power 1.
To combine them, you add the coefficients of the like terms.
So, y + 1.2y simplifies to 2.2y.
The other term in the expression, 1.2z, does not have any like terms to combine with.
Therefore, the correct answer is D: 2.2y + 1.2z.
3. To simplify the expression 6r + r - 5r, you once again need to combine like terms. In this case, all three terms have the variable r raised to the power 1.
To combine them, you add or subtract the coefficients.
So, 6r + r - 5r simplifies to 2r.
Therefore, the correct answer is A: 2r.
4. To simplify the expression 5x + 2(x + 6), you need to apply the distributive property, which states that a number or term outside the parentheses is multiplied by each term inside the parentheses.
Multiply 2 with each term inside the parentheses:
5x + 2(x+6) = 5x + 2x + 12
Now, combine like terms:
5x + 2x + 12 simplifies to 7x + 12.
Therefore, the correct answer is C: 7x + 12.
5. To simplify the expression -3m + 3(m + 6), you again need to apply the distributive property.
Multiply 3 with each term inside the parentheses:
-3m + 3(m + 6) = -3m + 3m + 18
Now, combine like terms:
-3m + 3m + 18 simplifies to 18.
Therefore, the correct answer is D: 18.